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| author | Malfurious <m@lfurio.us> | 2024-02-25 13:27:28 -0500 |
|---|---|---|
| committer | Malfurious <m@lfurio.us> | 2024-02-25 13:27:28 -0500 |
| commit | d6123769b5cddaa1ea87b64d4db2b84ead5f127e (patch) | |
| tree | cbe155fca9d3ca4f3d1a897ee381ec77cac30871 /docs/re/rep_prefix.txt | |
| parent | 2496fbbd23d6ae350032f2e87b1d77c9a6dc8ec4 (diff) | |
| parent | 175d1af3bf850fd0816a730215e028045d82e037 (diff) | |
| download | lib-des-gnux-master.tar.gz lib-des-gnux-master.zip | |
* malf-braekerctf-2024:
Writeup BraekerCTF 2024 / e
Writeup BraekerCTF 2024 / Eye Doctor
Add image convolution topic doc
Add x86 loop instruction callout
Merge x86 tips into architecture topic doc
BraekerCTF 2024 results
Diffstat (limited to 'docs/re/rep_prefix.txt')
| -rw-r--r-- | docs/re/rep_prefix.txt | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/docs/re/rep_prefix.txt b/docs/re/rep_prefix.txt deleted file mode 100644 index 23e0cec..0000000 --- a/docs/re/rep_prefix.txt +++ /dev/null @@ -1,18 +0,0 @@ -The "rep" prefix on a string instruction repeats that string instruction for CX block loads. -e.g. -STOS is "Store String" -It will store the value in AX at the address in RDI -(technically, STOSB, STOSW, STOD, and STOSQ use AL, AX, EAX, and RAX respectively) -If RCX = 0x20, RDI = some buffer, and RAX = 0, - -`rep stosq` - -is equivalent to: - -``` -buf_ptr = buf -for(i = 0x20; i != 0; i--) - *buf_ptr = 0; - buf_ptr++; -``` - |